GMC generators

Submitted: Wednesday, Mar 03, 2010 at 13:35
ThreadID: 76517 Views:6323 Replies:5 FollowUps:23
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Looking for parts or whole generator--GMC 750(500w)--or 650w-specifically transistor ignition box--
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Reply By: dbish - Wednesday, Mar 03, 2010 at 13:52

Wednesday, Mar 03, 2010 at 13:52
Hi Henery, Use Jaycar Kit KC4566 CDI module about $20 I have used one on a GMC 750 2stroke Genny & it works perfectly it also works on Kipor & honda Generators. I cant post pics on this site other wise i would show one fitted to a GMC genny (can show pics on caravan & motorhome site) Daryl
AnswerID: 407084

Follow Up By: dbish - Wednesday, Mar 03, 2010 at 14:16

Wednesday, Mar 03, 2010 at 14:16
Also check resistance readings on Red & black wire 32 ohm. Brown & black 668 ohm. The red & black wires are triger coil. TheBrown & black are the HV coil . This system used is a CDI ignition. Daryl
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FollowupID: 676905

Follow Up By: greybeard - Wednesday, Mar 03, 2010 at 16:43

Wednesday, Mar 03, 2010 at 16:43
jaycar don't seem to have that kit listed anymore.
is this the one?
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FollowupID: 676933

Follow Up By: greybeard - Wednesday, Mar 03, 2010 at 16:52

Wednesday, Mar 03, 2010 at 16:52
correction jaycar do have it, part number is kc5466 ;)
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FollowupID: 676937

Follow Up By: dbish - Wednesday, Mar 03, 2010 at 17:12

Wednesday, Mar 03, 2010 at 17:12
OOPS Typo thanks greybeard. Daryl
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FollowupID: 676944

Reply By: outsider - Wednesday, Mar 03, 2010 at 15:04

Wednesday, Mar 03, 2010 at 15:04
I have a 800w Gmc that won't run, any one got any tips?
It will fire but dies after a second or two, I'm thinking fuel problem.
I have had a look at it and can't find any thing wrong with it. It has fuel, carby looks clean and has decent spark.
The fuel is a little old but runs fine in the mower and whipper snipper.
AnswerID: 407105

Follow Up By: dbish - Wednesday, Mar 03, 2010 at 16:22

Wednesday, Mar 03, 2010 at 16:22
Hi outsider, First try fitting a new spark plug, found if you dont run them with a reasonable load the plug seems to give trouble. Local plug types areW8DC Bosch or BP6ES NGK.
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FollowupID: 676928

Follow Up By: outsider - Wednesday, Mar 03, 2010 at 16:52

Wednesday, Mar 03, 2010 at 16:52
I have tried a new plug no difference, Just had another go at starting it. It will fire almost every time, runs for a second or two and sound like it is going to keep going then just stops ?
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FollowupID: 676935

Follow Up By: dbish - Wednesday, Mar 03, 2010 at 17:25

Wednesday, Mar 03, 2010 at 17:25
Bit hard to say outsider, normaly a carby bowl full of fuel will run them for quite awhile, perhaps the CDI module is breaking down????? I keep acouple of the Jaycar CDI kits handy for cheking generators & outboards when a CDI unit is suspect. Its certainly cheeper than using the Manufacturers units & the components used are fairly robust. Daryl
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FollowupID: 676949

Follow Up By: Ianw - Wednesday, Mar 03, 2010 at 18:47

Wednesday, Mar 03, 2010 at 18:47
I had same problem. Stale fuel !!! Tip out old stuff , empty bowl and refill with fresh fuel. Goes well now. Only engine that I have had this problem with !!

Ian
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FollowupID: 676966

Follow Up By: Member - Keith C (NSW) - Wednesday, Mar 03, 2010 at 18:50

Wednesday, Mar 03, 2010 at 18:50
Outsider,drain carby and remove and clean/ream the main jet with fuse wire,mine was the same ,it would hunt but not run cleanly, the job is easy and should fix the problem for you,small engines need clean fuel.
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FollowupID: 676967

Follow Up By: Ianw - Wednesday, Mar 03, 2010 at 18:51

Wednesday, Mar 03, 2010 at 18:51
With 2stroke fuel, the petrol evaporates over time, leaving a mix that is too oil rich. The oil rich fuel will not flow properly in the carby because it is too thick. That is why it will start but not keep running.

Ian
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FollowupID: 676968

Follow Up By: Farmboywa - Wednesday, Mar 03, 2010 at 23:36

Wednesday, Mar 03, 2010 at 23:36
G'day dbish, what is a CDI unit/module.
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Follow Up By: Farmboywa - Wednesday, Mar 03, 2010 at 23:53

Wednesday, Mar 03, 2010 at 23:53
G'day outsider, there may be an easy start decompression device staying open once the engine has started. Happy Days.
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FollowupID: 677045

Follow Up By: dbish - Thursday, Mar 04, 2010 at 20:42

Thursday, Mar 04, 2010 at 20:42
Hi Farmboywa, There is no easy start decompression on these generators. The CDI unit is what fires the ign coil on nearly every outboard motor, generator & motor bike. There is a highvoltage winding for the unit powered from the flywheel & there is a triger coil which tels it when to fire the ign coil, that is a very basic description, It is usualy just a black box with 4or5 wires coming out of it. un fortunately i cant post pictures here. Daryl
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FollowupID: 677186

Reply By: Wizard1 - Wednesday, Mar 03, 2010 at 15:08

Wednesday, Mar 03, 2010 at 15:08
What you do is take the generator to the nearest tip and turn it into landfill...then buy a Honda or similar.

Minbe became landfill after I got my money back which I then used to put the deposit onan EU20.
AnswerID: 407106

Follow Up By: dbish - Wednesday, Mar 03, 2010 at 16:25

Wednesday, Mar 03, 2010 at 16:25
Wizard not every one can afford Honda & ive never had any trouble with my GMC. My other Geny is a 2600W Kipor also trouble free & eats a Honda when it comes to Aircond. Cheers Daryl
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FollowupID: 676929

Follow Up By: Wizard1 - Thursday, Mar 04, 2010 at 12:43

Thursday, Mar 04, 2010 at 12:43
Trust me dbish you'll find the money so you are stuck again.

When your camping a few hundred K's from Darwin in Arnhem land and you have this GMC boat anchor that won't start after running for only a few hours but all you can hear from a nearby campsite is the hum if a Honda...you wish you had that nice red quite unit that guy has.

It is worth every cent I payed for it!
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FollowupID: 677095

Reply By: henry45 - Wednesday, Mar 03, 2010 at 17:16

Wednesday, Mar 03, 2010 at 17:16
Thanks dbish & everyone-even wizard-thought of that believe me-but neighbour(ex telecom tech ) has one running ok for 3 years-we could not get any spark & isolated it to the ignition part-no numbers on it unfortunately--here must be thousands of units around --wonder what happened to all the spare parts-?there is a new 650w on ebay but in Townsville--& local delivery-but will watch it & if get it ask them to forward after I cover the costs-thanks again-I(can I go onto the caravan pages-?only just signed in today)
AnswerID: 407122

Follow Up By: kev.h - Wednesday, Mar 03, 2010 at 19:41

Wednesday, Mar 03, 2010 at 19:41
Greyhound busfreight out of Townsville is reasonable you can book and pay on your end then the seller only has to drop it off at the depot
Kev
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FollowupID: 676981

Follow Up By: Moggs - Wednesday, Mar 03, 2010 at 20:14

Wednesday, Mar 03, 2010 at 20:14
hi henry45, Where are you located? I have a GMC generator that is a bit dirty but in good working order which is surplus to our needs. It is located in Lysterfield Vic. We are relocating the famiily to Adelaide on 19 March and if you want it you can have it for free to use or break down for parts. Only thing though is you would need to pick it up as I am already in Adelaide working and the missus will not be able to pick it up lol!

If henry45 doesn't want it then anyone else want it? trying to clear out some stuff before the move.
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FollowupID: 676992

Follow Up By: WYSIWYG (Bundaberg Qld) - Thursday, Mar 04, 2010 at 00:03

Thursday, Mar 04, 2010 at 00:03
Hi Henry
What end of the country are you located

Cheers
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FollowupID: 677046

Follow Up By: henry45 - Thursday, Mar 04, 2010 at 08:01

Thursday, Mar 04, 2010 at 08:01
Thanks to everyone--I am only reg as visitor-will join later(money short)I am on ISIS river opposite Isis Junction-Barretts Road-(QLD)then Blacks Road-Are we allowed to post phone numbers/names ??am Vietnam vet on TPI-hence the isolation-Would love to get the genie Moggs--but bit distant--best wet season since 1974--ist time since then we have had(ex) cyclones & monsoon trough down--??--thanks kevh-was thinking of that-great site-I have a 1995 Golf Savananah-16ft 6--6foot 6 wide-tandem-solar-bought 2000-finally got the electrics sorted after years-Golf uses imported stuff & expensive-eg-solar controller-hundreds for replacement (german) but aussie part $90-

Oh--Where to buy Jaycar--I will look up on the net--thanks again-kev
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FollowupID: 677064

Follow Up By: kev.h - Thursday, Mar 04, 2010 at 18:47

Thursday, Mar 04, 2010 at 18:47
Henry
Jaycar are in Bourbong st Bundaberg between targo and tantitha streets on the side closest the river about middle of the block
Kev
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FollowupID: 677170

Follow Up By: WYSIWYG (Bundaberg Qld) - Friday, Mar 05, 2010 at 00:23

Friday, Mar 05, 2010 at 00:23
Hi Henry,
I have a 650w GMC you can have cheap. It was running well but I broke the fuel tap and haven't replaced it yet so has been out of action for twelve months. I live in Bundaberg but am away at the moment and won't be back for about a week. Let me know if you are interested and I will arrange to let you have a look when I get back.

Cheers
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FollowupID: 677227

Follow Up By: henry45 - Friday, Mar 05, 2010 at 09:07

Friday, Mar 05, 2010 at 09:07
Thanks kevh & wysiwyg--could not see bundy listed on site -am getting part from sydney-yes-wysiwyg-catch up when you return-can we send addresses phone etc on this-?may be an opening for a business dealing with GMC???!!!Not me though!--kev-
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FollowupID: 677248

Follow Up By: trainslux - Friday, Mar 05, 2010 at 16:24

Friday, Mar 05, 2010 at 16:24
Hi Moggs, if the genny follows you to adelaide, I can give it a home once its here for you.
Let me know.
I Realise that you may not want to pack it, but just in case.

Trains
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FollowupID: 677326

Reply By: WYSIWYG (Bundaberg Qld) - Sunday, Mar 21, 2010 at 20:51

Sunday, Mar 21, 2010 at 20:51
Hi Henry,
I'm back home again if you are still interested in the generator.
email rezarf@activ8.net.au if you would like to make contact.

Cheers
AnswerID: 409827

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